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31.
Mikael Swarén Anders Eriksson 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(2):190-201
Pacing strategies in cross-country skiing have been investigated in several studies. However, none of the previous studies have been verified by collected skiing data giving the skiing velocities along a measured track. These can be used to calculate the propulsive power output. Collected real-time positioning data from a cross-country sprint skiing race were used to estimate the propulsive power by applying a power balance model. Analyses were made for the time-trial and the final for one female and one male skier. The average propulsive power over the whole race times were 311 and 296 W during the time trial and 400 and 386 W during the final, for the female and male skier, respectively. Compared to the average propulsive power over the whole race, the average active propulsive phases were calculated as 33 and 44% higher in the time trials and 36 and 37% higher in the finals for the female and male, respectively. The current study presents a novel approach to use real-time positioning data to estimate continuous propulsive power during cross-country sprint skiing, enabling in-depth analyses of power output and pacing strategies. 相似文献
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This longitudinal study focused on the effects of two different principles of intervention in children at risk of developing dyslexia from 5 to 8 years old. The children were selected on the basis of a background questionnaire given to parents and preschool teachers, with cognitive and functional magnetic resonance imaging results substantiating group differences in neuropsychological processes associated with phonology, orthography, and phoneme-grapheme correspondence (i.e., alphabetic principle). The two principles of intervention were bottom-up (BU), "from sound to meaning", and top-down (TD), "from meaning to sound." Thus, four subgroups were established: risk/BU, risk/TD, control/BU, and control/TD. Computer-based training took place for 2 months every spring, and cognitive assessments were performed each fall of the project period. Measures of preliteracy skills for reading and spelling were phonological awareness, working memory, verbal learning, and letter knowledge. Literacy skills were assessed by word reading and spelling. At project end the control group scored significantly above age norm, whereas the risk group scored within the norm. In the at-risk group, training based on the BU principle had the strongest effects on phonological awareness and working memory scores, whereas training based on the TD principle had the strongest effects on verbal learning, letter knowledge, and literacy scores. It was concluded that appropriate, specific, data-based intervention starting in preschool can mitigate literacy impairment and that interventions should contain BU training for preliteracy skills and TD training for literacy training. 相似文献
33.
Gustafson S Fälth L Svensson I Tjus T Heimann M 《Journal of learning disabilities》2011,44(2):123-135
In a longitudinal intervention study, the effects of three intervention strategies on the reading skills of children with reading disabilities in Grade 2 were analyzed. The interventions consisted of computerized training programs: One bottom-up intervention aimed at improving word decoding skills and phonological abilities, the second intervention focused on top-down processing on the word and sentence levels, and the third was a combination of these two training programs (n = 25 in each group). In addition, there were two comparison groups, 25 children with reading disabilities who received ordinary special instruction and 30 age-matched typical readers. All reading disabled participants completed 25 training sessions with special education teachers. All groups improved their reading skills. The group who received combined training showed higher improvements than the ordinary special instruction group and the typical readers. Different cognitive variables were related to treatment gains for different groups. Thus, a treatment combining bottom-up and top-down aspects of reading was the most effective in general, but individual differences among children need to be considered. 相似文献
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Victoria A. Goodyear Charlotte Kerner Mikael Quennerstedt 《Sport, Education and Society》2019,24(3):212-225
An international evidence-base demonstrates that healthy lifestyle digital technologies, like exergames, health-related mobile applications (‘apps’) and wearable health devices are being used more and more within educational settings. Despite this, there is a lack of in-depth empirical evidence on young people’s experiences and uses of healthy lifestyle technologies. In this article we focus on young people’s uses of a wearable health device – Fitbit – and the associated health app. Informed by the work of Foucault, the purpose is to investigate the surveillance, self-surveillance and resistance that occur by young people. One hundred 13–14 years olds (53 females, 47 males), from five physical education classes in two UK schools participated. Data were generated through 8 focus group interviews, and the nominal interview group technique was applied. Data were analyzed using key concepts from Foucault’s theoretical framework. The results demonstrated that, the daily 10,000 step and calorie burning targets set by the Fitbit device encouraged the young people to do more physical activity. Increases in physical activity occurred because of the self-surveillant practices promoted by the Fitbit through; (i) the monitoring and recording of steps and calories burned, and (ii) peer comparison (or monitoring). Surveillance and self-surveillance practices, however, were clearly connected to health equating to fitness and being ‘fit’ or not being ‘fat’. These narrow interpretations of health, equally, underpinned resistance. Daily step and calorie burning targets, (i) did not sustain young people’s engagement with the device beyond a few weeks, (ii) promoted negative feelings, and (iii) the device was resisted because it did not record physical activity accurately as part of young people’s daily lives. In turn, the young people resisted the educational value of the Fitbit and demonstrated a sceptical stance toward introducing health devices in school and physical education settings. 相似文献
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The development of students' interest in school science activities, their understanding of central chemical concepts, and the interplay between both constructs across Grades 5–11 were analyzed in a cross-sectional paper-and-pencil study (N = 2,510, mean age 11–17 years). Previous empirical findings indicate that students' knowledge increases over the time of secondary school while students' interest, especially in natural science subjects, tends to decrease. Concomitantly, there is evidence for an increase in the positive coupling between interest and knowledge across time. However, previous studies mainly rely on rather global measures, for example, school grades or general subject-related interest, and focus on science as an integrated subject instead of specific disciplines, for example, chemistry. For this article, more proximal and differentiated measures for students' understanding of three chemical concepts (Chemical Reaction, Energy, Matter) and interest in seven dimensions of school science activities according to the RIASEC + N model (Realistic, Investigative, Artistic, Social, Enterprising, Conventional, and Networking; cf. Dierks, Höffler, & Parchmann, 2014) were applied. The results are in line with previous research indicating a general increase in conceptual understanding and a decline in students' interest for all school science activities. However, the interplay between conceptual understanding and interest differs across the seven dimensions. Interest in activities which are likely to promote cognitive activation (investigative, networking) or involving the communication of knowledge (social, enterprising, and networking) are increasingly connected to conceptual understanding, especially in upper secondary grades. Interest in guided hands-on activities (realistic) which are typical in secondary science teaching, however, shows only small positive correlations to students' conceptual understanding across all grades. Hence, in upper-secondary school, investigative, social, enterprising, and networking activities seem to provide opportunities to benefit most from the interrelation between students' interests and their understanding. 相似文献
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Ang ET Sugand K Hartman M Seow CS Bay BH Abrahams P 《Anatomical sciences education》2012,5(4):234-240
The disciplines of anatomy and surgery are not dichotomous since one is dependent on the other. Traditionally, surgeons predominantly taught gross and clinical anatomy. In this review, we examine the context of how human anatomy is taught nowadays. In essence, we discovered that there are certain discernable trends consistently observable between the American and British systems. In Singapore, the British Russell Group first influenced its education landscape but now more so by the American Ivy League. Singapore now has three medical schools all offering differing anatomy curricula, which serves as an opportune time for it to consider if there is a best approach given that the practice of surgery is also evolving in parallel. This review discusses the various pedagogies and issues involved, and will serve as a forum and stimulus for discussion. By tweaking the curriculum correctly and the lessons learnt, future doctors and surgeons in training will receive a better anatomical education, not just in Singapore but the world in general. Key recommendations include the use of body painting, clay, plasticine to facilitate the learning of anatomy, and the implementation of a body donation program. Furthermore, strategic mergers with key stakeholders will also ensure the survival of the discipline. 相似文献
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Eng‐Tat Ang Kapil Sugand Mikael Hartman Choon‐Sheong Seow Boon‐Huat Bay Peter Abrahams 《Anatomical sciences education》2012,5(4):C1-C1
A group of first year medical students at the Yong Loo Lin School of Medicine of the National University of Singapore study anatomy in the Anatomy Museum at this institution. Using an anatomical model, students discuss the extraocular muscles with their lecturers Drs. Boon‐Huat Bay (center) and Eng‐Tat Ang (third from left). In this issue of ASE, Dr. Ang and his colleagues review the past, present, and future of anatomy education in Singapore's three medical schools. 相似文献
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In this article we report on one of four schools involved in a research project aiming to develop knowledge about the way in which teaching knowledge is conveyed with the help of information and communication technology. A particular interest was issues of fundamental values. Two classes in Grade 9 of Swedish compulsory school were studied, by observations and interviews, when seeking information about international conflicts on the Internet. The results show that most students searched for and collected information with a focus on mainly one dimension: the temporal dimension of the conflict in question. How this focus on chronologically ordered historical events affected the students' ability to develop the capacity for individual standpoints on questions concerning ethics, morals, equality, and democracy by way of studying conflicts is discussed. 相似文献
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The purpose of the article is to outline a sociocultural way of exploring human movement. Our ambition is to develop an analytical framework where moving humans are explored in terms of what it means to move as movements are performed by somebody, for a certain purpose, and in a certain situation. We find this approach in poststructural theorizing, primarily in the work of scholars who emphasize the materiality of the sign, and the performative function of discourse. We will use this approach to engage with motor development, motor ability testing of children, and the results deriving from such practices. In addition, we engage in a critical discussion of some current attempts to complement biomechanical, medical, and psychological ways of understanding movement with phenomenological and sociocultural perspectives. We conclude by stressing the importance of exploring what it could mean to move in an endless range of moves (and bodies and identities). 相似文献